MAF code 158?
 

I am having problems! I am throwing code 158 "MAF voltage too high ". The car is surging under throttle. I have a blowzilla with the FMU that came with the kit. It worked fine until i changed the fuel pump. I installed a 190 and now this is my problem. The other fuel components as well as the mass air meter are stock. Please help the track opens sunday!
Matt